#
PHYS208 9/19 Class

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## The Electric Dipole

We will finish the previous class and then discuss the electric dipole with the time that remains.

### The Electric Dipole

The theme of today's class was the binomial theorem; each of the expressions for
**E** were evaluated far away from each charge distribution.
The charged disk was seen to behave as a point charge far away.
The dipole was found to have an **E** field which fell off as r^{-3},
rather than r^{-2} as for the point charge.

The binomial theorem plays a big role in allowing us to check the limiting behavior of expressions that we derive.
How big is it?

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Last updated Sept. 21, 1997.

Copyright George Watson, Univ. of Delaware, 1997.